They mutated into the people of the 80s, 90s, 00s, and 10s. They are still among us, I know, because I grew up in the 70s and remember the Apollo Missions- even visited Kennedy Space Center during the latter Apollo program. I remember the brawls at Yankee Stadium in 77, the streakers, the Son of Sam, I saw Star Wars in the theater ('77 was the pivotal year of the decade) and I remember the Iran Hostage Crisis, Jimmy Carter, the leisure suits, the huge collars that went out to the shoulders, watching the first broadcast of Saturday Night Live with my sister, and the long long long lines of cars at gas stations during the gas crises under Carter. I also remember the huge relief when Reagan was elected, if only because Carter was gone and the hostages were released- 444 days. One day in the barbershop I saw the cover of Newsweek- the charred body of an American airman, killed during the failed rescue mission, still wearing his helmet.